70280287 has 16 divisors (see below), whose sum is σ = 87892992. Its totient is φ = 54594720.

The previous prime is 70280263. The next prime is 70280291. The reversal of 70280287 is 78208207.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70280287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70280687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27498 + ... + 29944.

It is an arithmetic number, because the mean of its divisors is an integer number (5493312).

Almost surely, 2^70280287 is an apocalyptic number.

70280287 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

70280287 is a deficient number, since it is larger than the sum of its proper divisors (17612705).

70280287 is a wasteful number, since it uses less digits than its factorization.

70280287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 70280287 is about 8383.3338833664. Note that the first 3 decimals coincide. The cubic root of 70280287 is about 412.6778653830.

It can be divided in two parts, 7028028 and 7, that multiplied together give a square (49196196 = 7014²).

The spelling of 70280287 in words is "seventy million, two hundred eighty thousand, two hundred eighty-seven".